(19)
(11) EP 3 728 655 A2

(12)

(88) Date of publication A3:
01.08.2019

(43) Date of publication:
28.10.2020 Bulletin 2020/44

(21) Application number: 18833331.4

(22) Date of filing: 18.12.2018
(51) International Patent Classification (IPC): 
C21D 6/00(2006.01)
C21D 8/00(2006.01)
C21D 8/04(2006.01)
C22C 38/02(2006.01)
C22C 38/06(2006.01)
C22C 38/14(2006.01)
 C21D 9/46(2006.01)
C21D 8/02(2006.01)
C21D 9/48(2006.01)
C22C 38/04(2006.01)
C22C 38/12(2006.01)
C22C 38/18(2006.01)
(86) International application number:
PCT/IB2018/060242
(87) International publication number:
WO 2019/123240 (27.06.2019 Gazette 2019/26)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 19.12.2017 WO PCT/IB2017/058129

(71) Applicant: ArcelorMittal
1160 Luxembourg (LU)

(72) Inventors:
  • JUNG, Coralie
    57320 Racrange (FR)
  • PERLADE, Astrid
    57050 Le Ban-Saint-Martin (FR)
  • ZHU, Kangying
    57000 Metz (FR)
  • KEGEL, Frédéric
    57970 Yutz (FR)

(74) Representative: Lavoix 
2, place d'Estienne d'Orves
75441 Paris Cedex 09
75441 Paris Cedex 09 (FR)

   


(54) STEEL SHEET HAVING EXCELLENT TOUGHNESS, DUCTILITY AND STRENGTH, AND MANUFACTURING METHOD THEREOF